gpui: Fix incorrect colors comment (#38929)

| Before | After |
| - | - |
| <img width="466" height="207" alt="SCR-20250926-khst"
src="https://github.com/user-attachments/assets/c28a9ea8-3d22-458c-a683-b2fabe275a04"
/> | <img width="480" height="215" alt="SCR-20250926-kgru"
src="https://github.com/user-attachments/assets/cfee6392-804c-46e2-a55a-f72071264d10"
/> |

Release Notes:

- N/A
0891a7142dFloyd Wang committed on 9/26/2025, 3:53:04 AM· committed by GitHubparent94fe862
1 file changedLine totals unavailable